What is 4,500,000,000 in scientific notation? A. 45 x 10^-7
B. 4.5 x 10^9
C. 4.5 x 10^-9
D. 4.5 x 10^8

B.  4.5 x 10^9.

Step-by-step explanation:

Scientific notation is of the form:

N x 10^n   where  1  ≤ N < 10 and n is an integer ( ≠ 0)

We count the number of digits after the first one ( 4) - this comes to 9.

So the correct  answer is 4.5 * 10^9.

hope this !

step-by-step explanation:

d = distance between moon and sun, which in this problem is the hypotenuse of a right triangle.  

the distance y is the side opposite to angle x in the right triangle.   use the definition of the sine function from basic trigonometry.

sin(x) = y/d ⇒

d = y/sin(x)